I came across this question and was asked so often that I decided to turn it into a blog post.
Since finance is one of the biggest barrier that one could face, every resource listed here will be either completely free or at least provide a good amount of free resources/content.
The following suggestions will be more towards getting into penetration testing or red teaming but if that is not your thing or rather you do not know what your thing is I would highly recommend reading through Lesley Carharts’ Starting an InfoSec Career - The Megamix series. The series is quite extensive and you would also get a look at different specializations in infosec from the amazing people who are working in it; it is fantastic. Also, Lesley is one of the most talented person in the infosec community and you gotta follow her on Twitter.
I have myself barely just gotten my feet wet in the massive ocean that is infosec, but I know a little and would love to share whatever I know if it helps you out. In no shape or form is this gonna be THE ULTIMATE guide to follow, there are a TON of options and you must research on your own to find what works best for you ¯\_(ツ)_/¯
All this will only help you get started, perhaps even make you ready for an entry level job, but that is the most all these courses, CTFs, and trainings can provide you. Not so surprisingly, experience is the most important thing in this field and is what will help you get through your future hurdles, and you will build that in time.
Anyone who is just starting out in the industry, not sure where to begin, basically a noob. The following suggestions are as per my experiences, these are the things I did, and it has worked out for me, clearly.
Let’s say you found this field very interesting and want to dive into it but do not have any IT or computer experience before. I would suggest doing the Google IT Support Professional Certificate from Coursera. This course will cover all the basics you need to know before you get started with cybersecurity. The course provides 7 day free trial, so hack your way through it for a free certificate :)
Ok so you decided to be a pentester, let’s get started!
Note: None of the following needs to be done in a particular order, you can do things in any order whichever makes you feel more comfortable
This might seem like a little obvious or feel like I’m making fun of you, I’m not. Google will be your best tool throughout your journey regardless of what you intend on doing. Learn how to look up things properly, learn some Google Dorks to look for specific things. Google every issue or doubt you come across, there is a very high chance someone else went through that too.
Before you start with anything, ensure that you take plenty of notes. There are a ton of notes out there, but creating your own notes and hacking sheets will help you the most. I use following applications (both are free):
There’s no getting rid of the penguin. Ok, maybe there is, but learning Linux will open up a lot of the playground with which you can learn how to hack. Not to mention, a majority of the servers are infact Linux-based, along with almost all the IoT devices. There is a lot you can do with this.
Start by learning the basics of Linux
Some commands/tools that I feel you absolutely must learn are:
vimtutorcommand on Linux
Once you’ve done that you could head on to OverTheWire and start by playing the Bandit series to not only practice Linux in a CTF-style environment but you’ll also learn some cool tricks which may help you in the future.
Once you have grasped the basics, you should head on to bash scripting. Bash scripting, in my opinion, is quite underrated. Linux commands can do a ton of stuff individually, and you automate it using bash scripts you can achieve pretty amazing stuff like automating your exploitation process, or even enumeration.
You can learn bash scripting from here
I would also highly recommend learning Python. Like bash, python will come in handy in terms of automation, in some places bash will feel more “right” to use, other times python.
You can start learning python from here
One of the libraries that I would highly recommend learning is the requests library.
Python for hacking/exploitation is no different than any other python. Python is python. You just need to apply the concepts in different ways. Some of the projects/scripts that I would recommend making are:
You can achieve the same in bash :)
As Python can help in automating things, each language has its’ own pros and cons.
Other languages that you should consider learning are:
Web languages that you should be able to read at the least are:
If you’re wondering why did I not mention Java, the reason is quite simple, I absolutely despise it. If you want to you can learn it enough to be able to read it and understand what the code is doing.
Learning computer networks in essential. It might feel like a lot but in time you will get a hang of it. You do not need to take a graduate level networking course or something, but you should know the following at the least:
This YouTube playlist covers most of the topics if not all. Google things to learn more.
To understand the flow of connections and learn more about protocols, learn Wireshark, and tcpdump.
Want to learn networking a little more “properly”? Go through this Guide to Network Programming
With Linux, Python, and computer networks are out of the way, you now know some good amount of basics to go ahead with.
Next you could start learning how to exploit web applications.
The best tool, in my opinion, that you should learn how to use as proficiently as possible is PortSwiggers’ BurpSuite, which is a web proxy tool.
One of the best resources currently out there is PortSwiggers’ Web Security Academy. It goes through a lot of web exploits which are quite realistic, you could start with XSS or SQL injection. It also provides a free lab to practice each kind of exploit.
You can practice your python skills here as well.
Another resource that you should check out is OWASP, Open Web Application Security Project. OWASP provides brilliant projects like OWASP Web Security Testing Guide and OWASP TOP 10. You should go through them thoroughly.
You can also practice on OverTheWire - Natas
After learning all that the only way to learn more is by hacking. Some of the CTF websites that you can get your hands dirty are:
There are multiple ways of showing that you know something - certificate of completion, a social media post of “I hacked machine X”, and so on.
What stands out the most is making a blog and writing about what you learned, write about something you hacked and explain the vulnerability as deep as possible and at the same time suggest remediations to fix the vulnerability.
Create a GitHub repo to store all your scripts there, and display those as well!
If you’re considering getting certified or going for some certifications, I have stated which certification will provide you what:
Certifications are expensive, so if you do intend on getting one somehow while managing your financial problems, get only OSCP.
Before you go, read this.
I believe this is more than enough to get anyone into pentesting, if you have any doubt or suggestion, feel free to contact me :)
Take care and hack the planet!